Bug ID: 371062
           Summary: audio on some clips does not match playhead position -
                    only plays later audio, never earlier
           Product: kdenlive
           Version: unspecified
          Platform: Neon Packages
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: Video Display & Export

My screen capture software + codec combination creates video files where the
video feed appears to start a bit later than the audio. If I drag one of these
video clips to the timeline in Kdenlive and render the project, the resulting
video file has no synchronization issues.

However, if I try to play the clip in Kdenlive, either through the clip monitor
or on the timeline, the audio gets out of sync in a very strange way. Whenever
I stop the project and restart playback, the audio jumps forward beyond the
current playhead position. If I stop playback and then position the cursor at
an earlier point, the audio playback will still resume from a later point. In
fact, the audio is never able to go back to an earlier point of playback. If
you keep playing, starting, stopping, rewinding, etc., eventually, the duration
of the clip's audio will have been played, and any further attempts to play the
clip will result in nothing but silence.

The previous version of Kdenlive that I was using (don't remember--it was pre
KF5) did not have this problem, although I had to trim the beginning of the
clip a few seconds once imported onto the timeline if I wanted the audio and
video to be in sync. I edited many screencasts in that version of Kdenlive
without issues.

Reproducible: Always

Steps to Reproduce:
1. Download the following video and import it into Kdenlive's project bin:
2. Play the clip either by A) playing it in the clip monitor, or B) dragging it
onto a track and playing the project.
3. Occasionally stop playback and reposition the playhead (both earlier and

Actual Results:  
The audio only plays forward, never returning to an earlier point in the audio

Expected Results:  
The audio should be synced with the video.

Kdenlive 16.08.2 w/ MLT 6.0.0
OS: KDE Neon 5.8.1 64-bit (Plasma Desktop 5.8.1, KDE Frameworks 5.27.0, Qt

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